RE: Jetcat 180RX
 

Mine shows 10.1R

Rgds,
Mark

RE: Jetcat 180RX
 

Will be able to confirm tomorrow evening.

RE: Jetcat 180RX
 

ECU does auto mapping

RE: Jetcat 180RX
 

Hi,
Just checked my ecu and mine is also 10.1R.
Geoff.

RE: Jetcat 180RX
 

Geoff / Mark... Thanks for letting me know :)

RE: Jetcat 180RX
 

i guess all is well with your 180rx now?

RE: Jetcat 180RX
 

Weather has been rubbish for the last 2 weekends so I still haven't been able to fly to confirm everything is OK.

RE: Jetcat 180RX
 

In the same boat. -6, snow and ice. I'm staying indoors [&:]

RE: Jetcat 180RX
 

+20 bright and sunny. I am going flying. :)

RE: Jetcat 180RX
 

Despite it being very cold today, I have been flying my UL with the new ECU installed and I am pleased to say that the throttle response is as now excellent.:D

I had three flights, all using very aggressive throttle purposely trying to get issues but alas none occured. Although its difficult to say without a side by side comparison, I would say the response is the equal of the p160sx and this is with the idle throttle response and fast throttle response both set to normal.

Geoff.

P.S. also took the opportunity to run the ecu on a 3S lipo, as I got confirmation from JC that this is supported for all V10 ecu's apart from the p20 one.

RE: Jetcat 180RX
 

Good to hear Geoff... my only question is what is the benefit of running the ECU on a 3s lipo? I assume due to the higher voltage the current draw is less, but you've got more weight in the battery anyway.

RE: Jetcat 180RX
 

Hi Colin,

Although you have the option to use a 2s lipo, 3s lipo, 3s A123 or 5 cell Nicad/Nimh. We have found that the starting is definately more postive and quicker with one of the 3s batteries. Jetcat supply a 3S lifeP04 battery which I tried but quite frankly I found it absolute junk and so did Mark(voltage collapsed on startup). In fact, the vendor of the engine sent me a new battery as we were both convinced the original was faulty but the replacement was just as bad. Consequently, I decided to swap to a 3S lipo as I have never had any issues with them and of course they are the lightest solution.

Geoff.

RE: Jetcat 180RX
 

geoff thats great. now i can order mine with good peace of mind.. i am sure bob at jetcat usa will test and program the ecu with any information to make it 160sx throttle response.. i willbe at florida jets so i hope to get to see in action hopefully in a ultra lightning..hehe..take care

RE: Jetcat 180RX
 

Geoff is there a noticeable speed/performance difference with the 180 over the 160 in your UL? I have a UL coming and need to decide on the engine.

RE: Jetcat 180RX
 

No worries, you are in good hands. I spoke to Bob Wilcox this past weekend at Speed World about the P-100rx and P-180rx slow spool up issues. He is reloading the new software in all of the new ecu`s and is also setting them up so if there was a "reset" done it defaults to the new fast settings. The P-140rx is unaffected and needs no software update as it is already is set to spool up fast.
Vin...

RE: Jetcat 180RX
 

Dubd,

I would say there is little if any increase in straight line speed of the model with the P180rx fitted. The real difference comes in the vertical and real power hungry manouvres. For example, yesterday, I was doing big rolling loops and rolling cuban eights and there was plenty of power available so I could concentrate on the shape/size of the manouvre rather then making sure I had the inertia to get over the top. With the P160sx I had to be careful not to loose energy in the looping parts.

With the throttling issues sorted, I would say the P180rx is the perfect motor for the UL so if finances allow it, get one:D

Geoff.

RE: Jetcat 180RX
 

Thanks Geoff... I havent fired mine up yet, but I'll do the same. The supplied battery (which I had not even noticed was 3s, how unobservent of me!) is a 2100 (which I did notice!) and somewhat inadequate in a kero start engine anyway.

RE: Jetcat 180RX
 

Hi Colin,

Just recharged the lipo to check the consumption. I had three flights yesterday, the timer started once the retracts were up and the alarm went off at 10 minutes so each flight was about 11-12 minutes. Each flight was pretty hard on and the total consumption was 1500Mah so each flight used about 500Mah.

Geoff.

RE: Jetcat 180RX
 

Hi Geoff... I was primarily basing my experience on the P120SX I've got in another plane, which uses a 2s LiPo of course. With the 3s it would have a lower current draw. 500mAH per flight, including the start (it was the starts I found that really amped up the consumption), sounds pretty good. I'm all for not using a bigger battery than necessary.

RE: Jetcat 180RX
 

just got mine today! ecu show v10.1R

need to bench it to see how it works at Asia 30*



yiming

RE: Jetcat 180RX
 

Got my 180rx today...I plan on using the new duralite 2 cell lithium maganese with built in balencer..I have used them with 120sx and boy you can get about 8 flights....I never liked the a123 batteries....can't wait to fire this beast up

RE: Jetcat 180RX
 

Well guys I have just finished my 2M Futura and decided to test run my P100 RX before I installed it in the airframe.
My ECU version is 10.1L
There are two P100RX's in Johannesburg South Africa and neither of them will run, the ECU pumps too much fuel to try and accelerate the engine.
There are a lot of places in the world where guys will be running turbines at altitude, South Africa, South America, Arizona, Colorado, Switzerland etc.
I really hope JetCat can sort this mapping problem out for operating at 5500 feet above sea level (1676 meters)

Who would be the best guy at JetCat to talk too?

Here are the figures for four failed starts that I have had, the supplied 3 cell Life could not even cope with two starts, so it was binned.
__________________________________________________ __________________________________________________ __________________________________________________ _

My small Futura is finished and I decided to run my P100 on a bench as we have one other P100 in South Africa and the guys have been battling with hot starts.
This other P100 was installed in a Boomer and test run and flown at sea level before it was sent up to Johannesburg, when they tried to start it up here at Johannesburg (5500 feet above sea level) they had hot starts.

My P100 was installed on a bench, the first start was tried with the ECU left at factory settings, all went well, smooth kero start, acceleration up to idle with full kero went well with just a couple of small flames (normal). I then did a learn low, learn high, and the GSU stored the parameters. I let it cool and then tried a second start, it lit up on kero and accelerated to about 34 000 rpm and just stayed there with flames (yellow and blue) shooting out the back until it did an auto shut down with ACC.Slow displayed on the GSU. I tried three more starts, all of them with different setting on the GSU, I tried Barom. Autotune Disabled (factory setting) I tried Barom.Autotune Idle&Ramp-set, and I tried adjusting the idle rpm up 1000 rpm for every 1000 feet above sea level. ie I set the idle rpm from 42000 to 47000. I am not sure if this has any effect on the auto start.

I tried again today with an experienced jet modeler, we documented all the starts as well as video taped all the starts.
For these tests we replaced the JetCat 3 cell Life with a 2 cell Lipo 4000mah 30c. The ATIS for the day was wind 280/08 CAVOK temp 25’c dewpoint 9’c relative humidity 36% pressure 1020 hpa all of this at Johannesburg at 5550 feet above sea level.

1st Start Barom.Autotune Idle&Ramp set
Avg pump 0.35 Baro 839.40
Avg temp 119 Pressure alt 1560
Max rpm 29 000 PF=0.77
Max pump 1,05 Reason for shutdown RC-OFF as we had
Max temp 881 too much flames
Min temp 24
Avg pump 0.35
Avg temp 111

2nd Start Barom.Autotune disabled
Avg pump 0.30 Baro 839.30
Avg temp 164 Pressure alt 1560
Max rpm 33 000 PF=0.78
Max pump 1,05 Reason for shutdown Acc-slow
Max temp 650
Min temp 37
Avg pump 0.30
Avg temp 147
For the 2nd 3rd and 4th starts we rotated the turbine that the EGT probe was at the top, hence the lower Max temps

3rd Start Barom.Autotune Idle&Ramp set
Avg pump 0.35 Baro 839.40
Avg temp 138 Pressure alt 1560
Max rpm 39 180 PF=0.77
Max pump 1,25 Reason for shutdown Acc-slow
Max temp 673
Min temp 53
Avg pump 0.35
Avg temp 146

4th Start Barom.Autotune disabled
Avg pump 0.20 Baro 839.20
Avg temp 193 Pressure alt 1561
Max rpm 30 500 PF=0.78
Max pump 0.75 Reason for shutdown Acc-slow
Max temp 664
Min temp 52
Avg pump 0.20
Avg temp 208

Starts 1 and 2 were done with min rpm and idle rpm at factory values, starts 3 and 4 were done with min and idle rpm set 5000 rpm higher than factory values. ECU changed to accommodate 2 cell lipo and battery was checked before every start.
I think the fact that there are two P100’s with the same symptoms it must be the ECU mapping at high altitude, a lot of the guys with older Jetcats turn down the start pump voltage, but on the RX ECU you cant adjust it. All start attempts had the same outcome, perfect start and acceleration up to about 30000 rpm and the as the full kero comes on the turbine hangs and then the flames get bigger and bigger while it starts to decelerate until it does an auto shutdown. We have stood behind it to make sure all the burners are working and checked for starter motor slippage.
The fourth start I recorded the GSU screen as it tried to start the turbine.

I would like your and JetCats sugestions and recommendations as to how to proceed. The engine is new, never flown and still under warranty. I think the engine is OK and I think it is a ECU mapping problem, but I could be mistaken.

Here is a photo of the GSU reading the barometric conditions next to my iPhone with the actual conditions.

RE: Jetcat 180RX
 

call and ask.
phone numbers are here http://www.jetcat.de/